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2020+ Silverado HD & Sierra HD Troubleshooting

A central location to report any issues or asking for help troubleshooting any problems with your 2020 Chevrolet Silverado 2500 / 3500 or 2020 GMC Sierra 2500 / 3500. Also recall announcements and Technical Service Bulletins (TSB).

Followers 14

377 topics in this forum

  1. Drive Shaft Ring?

    By cNate,
    • 3 replies
    • 1.8k views

  3. 3.0 Duramax cranks but won’t start 1 2 3 4 30

    By Dbersuch,
    • 438 replies
    • 64.6k views

  4. 2020 High Country 3500 HD will not power trailer jack motor or trailer interior lights

    By Wahou,
    • 5 replies
    • 177 views

  5. Tailgate spontaneously opening 1 2 3

    By jsward12,
    • 44 replies
    • 9.3k views

  6. Trailer lights 1 2 3 4 5

    By Jordan94,   
    • 65 replies
    • 39.4k views

  7. Flashing trailer lights

    By insidethreat07,
    • 6 replies
    • 1.5k views

  8. 2020 6.6 Liter Gas Engine Problems

    By Bill Shaffer,   
    • 2 replies
    • 6.5k views

  9. Do I need to get the undercoat treated?

    By GMC4Zee,
    • 3 replies
    • 468 views

  10. Trailer camera issues - 2020 Denali HD - Bad 7 way connectors? Recall?

    By In2racn,
    • 4 replies
    • 312 views

  11. Multipro Tailgate Issue

    By seniorjumper82,
    • 6 replies
    • 627 views

  12. Infotainment Audio Issues 1 2

    By kf9yr,
    • 17 replies
    • 6.6k views

  13. Power Tailgate Won’t Open

    By BruceP,   
    • 12 replies
    • 8.4k views

  14. 2020 GMC AT4 - Won't start, won't even attempt to turn over 1 2

    By CO 2020 GMC AT4,
    • 27 replies
    • 20.5k views

  15. Engine knock a 500 miles 1 2 3 4 10

    By bass mechanic,
    • 135 replies
    • 44k views

  16. 360 camera alignment

    By CHIp070,
    • 3 replies
    • 188 views

  17. Brake Noise

    By kylant,
    • 4 replies
    • 364 views

  18. Brake pedal hard to push 1 2 3 4

    By gerald compton,
    • 52 replies
    • 9.1k views

  19. Missing module?

    By don penney,
    • 0 replies
    • 136 views

  20. No Trailer Connected Issue

    By Leon Baehre,
    • 8 replies
    • 9k views

  21. 2020 2500hd high country door latch noisy

    By Paul jackckson,
    • 13 replies
    • 2k views

  22. Service keyless start system comes up when I start my vehicle

    By don penney,
    • 0 replies
    • 124 views

  23. Service keyless start system comes up when I start my vehicle

    By don penney,
    • 0 replies
    • 53 views

  24. Power Steering Noise- started at 100 miles! 1 2

    By Limelight,
    • 19 replies
    • 9.9k views

  25. 10L1000 Assembly Lube?

    By Armgrim,
    • 2 replies
    • 272 views

  26. Brakes Squeaking @ 10K 1 2 3 4 5

    By LarryM,
    • 68 replies
    • 19.9k views


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